/Engine/Source/Runtime/Experimental/Iris/Core/Public/Iris/Serialization/NetBitStreamWriter.h
Writes BitCount bits from Src starting at SrcBitOffset. Assumes that Src was written to via this class or that bits were written in order from lowest to highest memory address. If the BitCount exceeds the remaining space no bits will be written and the stream will be marked as overflown.
void WriteBitStream ( const uint32 * Src, uint32 SrcBitOffset, uint32 BitCount )